Furnace for roasting quicksilver ores



(No Model.)

H. J. HUTTNER.

Furnace for Roasting Quicksilver Ores. No. 234,985. Patented 'Nov.'30, 1880.

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Witnesse s; Inventor:

- NITE STATES ATENT rrrcn.

HENRY J. HUTTNER, OF SAN FRANCISCO, CALIFORNIA.

FURNACE FOR ROASTING QUICKSILVER ORES.

SPECIFICATION forming part of Letters Patent No. 234,985, dated November 30, 1880.

Application filed June 14, 1880. (No model.)

To all whom it may concern Be it known that I, HENRY J. HUTTNER, of San Francisco, State of California, haveinvented a new and useful Improvement relating to the Furnace for Roasting and Desulph urizin g Quicksilver Ores invented by myself and Robert Scott, and patented to us October 31, 1876, by Letters Patent of the United States numbered 183,934, of which the following is a specification.

In the patent above mentioned a furnace is described having a chamber (marked A in said patent) which is divided by a partitionwall commencing at and solid upward from u the foundation, thus forming two compartments. From both of these compartmentsthe roasted ore must be drawn at the bottom. The manner of doing this described in the said patent is to draw from the compartments of the furnace in diametrically-opposite directions through the discharge-holes. (Marked D in said patent.) found that this arrangement of the discharge is seriously objectionable, both with single furnaces with but two compartments and in those cases where these furnaces are built in nests of two or more, back to back, because in the case of single furnaces with the old construction the ore must be drawn on each side of the furnace, which is not always convenient, and in case of furnaces placed back to back the drawing of the debris from the inner chambers must necessarily be done underneath the furnace, thus largely increasing the cost of construction and adding to the inconvenience of operating. It is the object of my present invention to obviate these difficulties.

It will not be necessary for me to describe the furnace in all its details in this specification, because a full description can be found in the patent numbered 183,934 aforesaid, this invention being simply an additional improvement thereupon.

In the accompanying drawings, Figure 1 is a half cross-section of a furnace, showing the lower portion of a chamber illustrating the diseharging-passages, the dotted line a I) being the central dividing-line from the other half of the furnace. Fig. 2 shows a front view of the same. Fig. 3 is a view taken similarly to Sometimes it has been,

Fig. 1, but the construction is slightly modified, Fig. 4 being a front view of the same.

In all the figures of the drawings the same letters of reference refer to like parts.

A is thefront and Ais the rear compartment of the furnace in which the ore is submitted to the action of the heat. B is the partitionwall separating these compartments. C is a strong cast-iron girder or lintel having a crosssection, as shown. This girder stretches across from wall D to wall D of the furnace. and passingentirely through these walls, being without closed ends, a current of air from the lines E will pass through the girder and keep it cool. This girder supports the partitionwall B and leaves a passage-way, F, below it leading from the rear compartment.

G is a shelf, being part of and extending from the girder to a little beyond the face of the wall, so as to keep the debris from the two compartments separated until finally discharged. If desired, this shelf may have a hinged joint, as shown at H, so that the shelf may be dropped down to form an incline, as indicated by the dotted lines in Fig. 1, thus giving less fall to the debris from the upper discharge as it is raked into the cars below.

I is a strong ribbed cast-iron lintel about the same length as the girder C, stretching from wall D to D, and supporting thefront wall, K, of the furnace, so as to admit of the dischargeopening below it. J are hooked braces,',which are used to hang up the hinged shelf when drawing the ore from the lower discharge.

As a substitute for the cast-iron girders or lintels, I may'usc stone lintels, or I may, as I have shown in Figs. 3 and 4, build the walls 13 and K upon one or more arches, L, leaving openings beneath, as before described. In case this latter plan is adopted there must still be a provision made for the shelf G, which is provided withor may be without the hinged joint, as at H. The remaining details are unchanged.

The shelf G, which, as before stated, is used to separate the discharging de'bris, permits the operator to easily know the quantity discharged from and whether any stoppage or irregularity of action occurs in either compartment.

NVhat I claim as my invention, and desire to secure by Letters Patent, is as follows:

1. In an ore-roasting furnace, the combination, with the Walls D D, of the girder G or a-rch for supporting the partition-Wall B and forming adischarging-passage, F, underneath,

went from that of the other, whereby the op erator can 'noteftheiquantity discharged from each compartment, and thus discover anystoppage or ;irregularity of action in either comdischarged from the front of the furnace, substantially as described.

2. In combination with the girder or arch and partition-Wall, the shelfG, for keeping sep- IO arate the debris or spent ore of one compart- HENBY J. HUTTNER.

Witnesses:

GEORGE PARDY, OARLIsLE P. BLANCHARD. 

